Sample splitter



April 13, 1937'. J. B. PARsoNs I 2,076,861

' SAMPLE SPLITTER Filed Nov. 21, 1934 &q

25 a3 22 26 2/ 3 2 20 I I IWRI H Y 1' INVENTOR. James 2 Pa 2 5072.51

ATTORNEYS of bulk material.

Patented Apr. 13, 1937 UNITED STATES SAMPLE SPLITTER James B. Parsons, Indiana, .Pa., assignor .to The W. S. Tyler Company, Cleveland, Ohio, a cor- .porat'ion of Ohio Application November 21, 1934, Serial No. 754,082

.4'Claims. The present invention, relatingas indicated to a sample splitter, is particularly directed to an apparatus for automatically and accurately removing a desired fraction from a given amount The principal object of the invention is the provision of a simple and accurate apparatus for use in splitting off or removing a given fraction of a sample of such bulk material as coal, seeds, grain, sand graVeI, chemical material and the like by merely pouring the entire amount through theapparatus.

, To the aocomplishmentof the foregoingand related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims; the annexed drawing and the following description setting forth in detail certain structure embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexeddrawing:

Fig. 1 is a plan view of one form of my improved invention, the view beingtakenat right angles to the plane of the upper surface of the device, as shown in-Fig. 2; Fig. 2 is a longitudinal central section on the plane indicated by the line 22 in Fig. 1; Fig. 3 is a section on the plane indicated by the line 3-3, in Fig. l; and Fig. 4 is a similar section on the plane indicated by the line 44 in Fig. 1.

Sample splitting devices now in common use permit of the division of a sample of bulk material into two equal parts, and if a sample consisting of g or some small fraction is desired the material must be handled and subdivided a number of times, which is not only laborious but tends to inaccuracy from loss in handling the split-01f fractions of material. My improved invention permits of the subdivision of a sample of bulk material into a large and a small fraction by a single operation, after which the small fraction can be examined and its analysis as to size of particles accurately determined in other apparatus. My apparatus consists, as

shown in Figs. 1 and 2, of a feeding trough mounted on the upper end of a box-like casing 2 which is supported in an inclined position by supports 3 and 4. The upper surface 5 of the box-like casing 2 is provided with a plurality of rows of, transversely aligned projections and openings, the projections and openings in each row serving to divide the material as it passes,

down the upper surface 5 of the casing. The first row which the downwardly projecting material meets consists of openings 5, 1, 8 and 9 bounded by upwardly projecting walls ill. The total, transverse width of the openings 6, 1,8 and 9 is equal to the total transverse width of the passages ll, l2, I3 and 4 between the openings or rather between the walls In of the openings, 5 so that material flowing down from the feeding hopperl in a uniform layer over the upper plate 5 of the casing will be divided evenly, half of the material being dropped through the openings 6,"|, 8 and 9 on to the lower plate l5 of 10 the casing and the other half of the material being allowed to flowpast the upper row of openings and projections to the second row.

,The second row consists of triangular projectingprojectio ns or bailles 20, 21, 22 and 23, the 15 surface of the sheet to the right of the line 24 and to the left of the line 25 being cut away to provide openings permitting material to be dropped onto the lower sheet l5 of the casing. There is also an opening 26 extending from the two 20 outer edges of the projections 2| and 22 downwardly toward the next row of projections of the shape indicated and on either side of this opening to the right of the line 28 and to the left of the line 29 the casing is open to also permit 25 material to fall on to the lower plate. Thus, of the material falling against the upper edges of the triangular projections 20, 2|, 22 and 23 half of the material striking the projections 20 and 23 is dropped to the lower casing over the cut- 30 away edges 24 and 25 and half of the material striking the projections 2| and 22 is also discharged on to the lower plate through the opening 26.

The balance of the material which passes the 35 second row of projections engages upon the two triangular projections or baflles 30 and 3| in the third row which are directly beneath the openings 32 and 33 which lie between the projections 20 and 2| and 22 and. 23 respectively in the sec- 4 I 0nd row. This material is evenly divided as it engages the upper edges of the projections 30 and 3|, the portion falling to the right of the projection 30 and to the left of the projection 3| being discharged over the edges 28 and 29 re- 45 spectively of the upper plate 5 and the other half of the material being allowed to flow past the third row and against the fourth row of projections. In the fourth row are two projections or bafiles 40 and 4|, and these two projections 50 again divide evenly the material which strikes against them, one-half being discharged over the edge 42 and the other half over the edge 43 of the upper plate and the balance being fed through and between the inner adjacent surfaces of the 55 Cir projections 10 and M into a discharge chute 45, from which the fraction of the sample to be retained may be collected.

A single sample of material is divided in two parts by the first row of projections, the retained half is again divided in two equal parts by the second row of projections so that the retained fraction passing the second row is onefourth of the original sample. This quarter is again divided in two equal parts in the third row, allowing one-eighth to reach the fourth row of projections, and this eighth is again divided evenly, allowing one-sixteenth of the original amount of material to pass into the discharge chute and be collected. The material which has been discharged downwardly through and over the side edges of the plate 5 is collected by the lower plate I5 and discharged therefrom at the outlet i5a, as most clearly shown in Fig. 2. It will be evident that my invention is not limited to a device for splitting a one-sixteenth of a sample and that by multiplying the rows, smaller fractions may be taken, while by changing the division produced in each row different fractions also may be subtracted as the material passes through the device.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means may be employed.

I therefore particularly point out and distinctly claim as my invention:-

1. In a sample splitter, the combination of an inclined flat plate, and a plurality of rows of transversely aligned baffles extending upwardly from said plate, the faces of said bailles being disposed at an angle to the direction of flow of material, the battles in adjacent rows being out of alignment with respect to the direction of flow of material whereby said rows of baffles respectively split a stream of material flowing over the plate into successively smaller fractional streams, said plate having openings for the discharge of certain of said fractional streams after being formed on said plate.

2. In a sample splitter, the combination of an inclined flat plate, and a plurality of spaced rows of transversely aligned baffles extending upwardly from said plate, the faces of said baflles being disposed at an angle to the direction of flow of material, the baffles in adjacent rows being out of alignment with respect to the direction of flow of material whereby said rows of baflles respectively split a stream of material flowing over the plate into successively smaller fractional streams, said plate having openings for the discharge of one of said fractional streams formed by each of said baffles.

3. In a sample splitter, the combination of an inclined fiat plate, and a plurality of spaced rows of transversely aligned bafiles extending upwardly from said plate, the faces of said baffles being disposed at an angle to the direction of flow of material, the bafiles in adjacent rows being out of alignment with respect to the direction of flow of material whereby each of said baflles split a fractional stream of material flowing over the plate into two smaller fractional streams on said plate, and said plate having openings for the discharge of one-half of said last-named fractional streams after being formed on said plate.

4. In a sample splitter, the combination of an inclined plate for the passage of the material to be sampled, and a plurality of baflles laterally and longitudinally arranged on said plate, said baffies having surfaces opposed to the direction of flow of the material across said plate, said plate having openings adjacent one side of each of said baffles for the discharge of a fractional portion of the material, said plate also having continuous portions adjacent the other side of each of said baffles, and each of the progressively lower bafiles being located in longitudinal alignment with each of said continuous portions.

JAMES B. PARSONS. 

